simpson



No. 608,305. Patented Aug. 2, I898. S. W. SIMPSON.

1 Lmmm h I InVentO r. I

UNITED STAT PATENT @rrrce.

SAMUEL-w. SIMPSON, OF OTSEGO, MICHIGAN, ASSIGNOR TO THE BARDEEN PAPER COMPANY, or SAME PLACE.

MEANS FOR REMOVING FOREIGN SUBSTANCES FROM PAPER-PULP.

SPECIFICATION forming part of Letters Patent No. 608,305, dated August 2, 1898.

Application filed April 5, 1897. Serial No. 630,751. (No model.)

To all whom it may concern.-

Be it known that I, SAMUEL SIMPSON, a citizen of the United States, residing at the village of Otsego, in the county of Allegan and State of Michigan,have invented a certain new and useful Means for Removing Foreign Substances from Paper-Pulp, of which the following is a specification.

My invention relates to improved means for removing foreign substances-such as pieces of metal, particles of sand, or any heavy materialfrom paper-pulp during the process of its manufacture.

Heretofore as paper has been ordinarily manufactured a long trough or passage has been provided in which particles of metal were allowed to settle while the pulp was flowing along or eleotromagnets or similar devices were made use of to attract and extract the particles of metal. These methods are defective, and Where used considerable quantities of finely-divided iron and brass and other foreign material find their way into the sheets of papermuch to the detriment of the same.

This invention has for its object a simplev I and convenient means of'collecting particles of metal or any heavy material which may remain in the paper-pulp, and which will remain in the paper-pulp after the most careful sort-- ing and cleaning, and to provide an improved process of treating the paper-pulp to secure the removal of foreign substances of this class.

I accomplish these objects of myinvention by the devices and means -described in the following specification, pointed out definitely inthe claims, and illustrated .in the accompany iug drawings, in which V Figure 1 is a top plan view of a portion of a chute for paper-pulp with my improved metal and sand arrester attached. Fig. 2 is a longitudinal detail sectional elevation on line 22 of Fig. 1, looking in the direction of the little arrow's'at the ends of the section-lines.

In the drawings similar letters of reference refer to similar parts throughout the several views.

Referring to the lettered parts of the drawings, A is a chute for paper-pulp having the usual mat J in the bottom to entangle and retain particles of metal or other material that may be precipitated from the pulp in passing and is in the form of the usual sand-box.

B is the usual mixing-box, divided into sections 13 B by a suitable partition, which contains the usual outlet-openings F F at the bottom and openings in the sides controlled by gates D D at the side to regulate the amount of water and stuff which flow together in the box or chute below. Any two openings for discharging any liquids will discharge more than one of these openings, and by controlling the size of one opening consequently theamount of liquid discharged from the tank will be controlled to that extent by the control of that one opening. That is accomplished in-this case. The amount of the discharge through the opening F is below the amount needed, and the full amount is controlled by opening and closing the gate D. The usual deflectors I I are provided to prevent overflow.

A partition H extends transversely across the chute'or box beneath the mixing-box. A settling-box C is placed beneath the chute or box A and extends to each side of the partition H. An opening G is through the bottom of the box or chute toward the end thereof and leads down into the settling-box O, and another opening G is on the opposite side of the partition H and leads up into the chute to permit the passage of the stulf or pulp on through the chute to the paper-making machine or Where it may be needed. A suitable gate E is provided at the bottom of the settling-box C to permit the removal of accumulations.

In operation pulp is admitted to one section B and water to the opposite section B of the mixing-box, where it is allowed to flow together into the end of the chute or box J, where it becomes thoroughly mixed and descends in a gentle current into the settlingloox O, which, owing to the current, is kept constantly, but gently, agitated. As more of the pulp is admitted through the passage G it forces pulp within the settling-box C to rise through the opening or passage G into the box or chute beyond, and owing to the gentle agitation occasioned by the current and the upward flow given at this point particles of metal, sand, or other material will be disentangled from the fibers of the pulp and will readily settle to the bottom of the settlingbox O,\vhere at convenient intervals they may be removed through the gate E.

From this description it will be clear that my improved apparatus is adapted for use in any kind of paper-pulp made from any kind of stock, whether the same be rags, paper, wood, straw, or any other material. The exact apparatus I have used fol-accomplishing this result is preferred by me because it is very simple and easily applied in the papermills now in use. It is only necessary to insert the partition II in the usual sand box or chute, place the settling-box O beneath, and make the openings G G in the bottom of the sand-box to each side of the partition II to permit the circulation. I am aware that the same result can be accomplished by various structures, it only being necessary to provide a comparatively deep receptacle and make connections that will force a current of the pulp into and out at the top of the same or provide some other means for agitating a quantity of the pulp in a comparatively deep receptacle.

Having thus described my invention,what I claim as new, and desire to secure by Letters Patent, is

1. In apparatus torremovingheavy matter from paper-pulp the combination, of a box or chute A,With a transverse partition II, across the same; a mixing-box delivering into one end of the chute; a settling-box U, secured to the under side of the chute and extending each side of the partition II, with suitable openings G, G, connecting the box or chute with the settling-box on each side of the partition II, to compel circulation of the pulp down into the settling-box and up into the box or chute to permit of the settling of partieles of metal or other heavy material therefrom for the purpose specified.

2. In apparatus for removing heavy matter from paper-pulp, the combination of a box or chute A,With a transverse partition II, across the same; a settling-box O, secured to the under side of the chute and extending each side of the partition II,with suitable openings G, G, connecting the box or chute with the settling-box on each side of the partition II, and means to deliver the pulp to the box or chute so that it shall descend into the top of the settling-box on one side of the partition and flew up and out 011 the opposite side through the box or chute for the purpose specified.

In apparatus for removing foreign material from paper-pulp the combination of a settling-box with passages leading into and out of the top thereof and means of circulating the pulp through the same for the purpose specified.

In witness whereof I have hereunto set my hand and seal in the presence of two witnesses.

SAMUEL IV. SIMPSON. It. s] \Vitnesses:

II. II. Mnn'rmnann, Lnnm DREW. 

